package com.lesama.system;

public class SystemDemo {
    public static void main(String[] args) {
        System.out.println(System.currentTimeMillis()); // 1970年1月1日0:0:0至今的毫秒数

        int[] arr1 = {11, 22, 23, 23, 44};
        int[] arr2 = new int[3];
        System.arraycopy(arr1, 2, arr2, 0, 3);
        for (int i = 0; i < arr2.length; i++) {
            System.out.println(arr2[i]);
        }
    }
}
